Humidifier



FIG. 1 is a top, left, and front perspective view of a humidifier showing our new design;

FIG. 2 is an elarged top plan view thereof;

FIG. 3 is an enlarged rear elevation view thereof;

FIG. 4 is an enlarged front elevation view thereof;

FIG. 5 is an enlarged left side elevation view thereof, the opposite side being a mirror image of that shown; and,

FIG. 6 is an enlarged bottom plan view thereof. 

The ornamental design for a humidifier, as shown and described. 